Locomotive boiler



March. 19, 1935. J. J. DALY LOCOMOTIVE BOILER Filed Oct. 23, 1933 J. J. DALY 'LOCOMOTIVE BOILER March 19, 1-935.

Filed Oct. 23, 1933 5 Sheets-Sheet 2 O O 0 0 O 0 0 O O 0 9 G o O G G O O Q 0 March 19," 1935. J. J. DALY LOCOMOTIVE BOILER Filed Oct.

23, 1935 5 Sheets-Sheet 3 OOOOA O OOOOQOOOOOGGG 00 OOOO OOOO oooooogo 0 oo\o 0 0 0 O 0 O 0 0 O 0 0 O 6 0 O O O 0 0 0 0 e G O 0 0 inner shell, of the type which normally encloses Patented Mar. 19, 1935 UNITED sTAjrEs grassr- 'fiocoMoTIvE BOILER John J. Daly, Virginville, P... Application October 23, 1933, Serial No. 694,842

7 I 4 Claims. (01-122 8) This invention is atubular boiler structure of the type adapted for railroad locomotives.

One of the objects of the invention is to.provide' an improved boiler of the character mentioned,

so constructed and arranged thatthe necessity of employing fire brick in the construction of the fire-box arch is avoided, thereby greatly reducing the cost of boiler maintenance. A further object is to provide a strong but flexible boiler construction, in which the safety factor is materially increased by improved water circulation. A fur ther object is to provide an increased'water heating surface, and means whereby all of the parts are readily accessible for inspection and repair;

A further object is to provide a supplemental water chamber, so positioned as to intercept and deflect the products of combustion inthe fire box, in such manner as to eifectively heat said chamber on two sides, said arch being positioned at any desired angle, and constructed of any selected width longitudinally of the fire box. "A further object is to provide means by which a crown sheet is firmly and safely supported by said supplemental chamber, and the water circulation the fire box F of a locomotive, and 11 is the outer shell, said shells being supported in relatively spaced relation in the usual manner by means of staybolts 12, so as to provide a water space W between the shells and a throat'T, as clearly shown in the drawings. The crown sheet 13 of the inner shell is provided with a plurality of relatively spaced elongated openings 14, and the side walls of said sheet are also provided with rearwardly and upwardly inclined elongated openings 15,

leading rearwardly throat T. V

Extending transversely of the fire box'F is a supplemental water chamber X, whichiinclu'des a bottom wall 16 extending the full width of the fire box and having an upturned flange 17 at its upper end and a downturned flange 18 at its lower and upwardly from the well known manner.

edges Theend edges of the bottom wall 16, and

the flange 17 fit within the openings 15 in the sides of the inner shell. fits within and is secured to a complemental edge The lower end flange ofan elongated opening 15a in the innershell 10' at the throat T.

The top of the chamber X consists of an archsheet 25having flanges 2 lwhich also fit within the elongated opening 15 in the sides of the inner shell; The lower edge of said flange also fits within the opening 15a and is secured to an edge or said'opening. Said'sheet 25 is also provided witha plurality of elongated openings 23 parallel to and in register with the openings 14of the crown sheets Depending frointhe crown sheet 13 are a plu- V rality of narrow water legs L, each of which has flanges 19 at its upper portion, extending into and secured within the openings 14 in the crown sheet. The front wall '20'of each leg L is longer than the rear wall21, and each leg is provided'at its lower end with a flange 22, .which is secured to the free edge ofan opening 23 in the arch sheet 25. It-willbe noted that three legs L areshown with the middle leg somewhat longer than the others.

However, the flanges 17 and 24 abut at the upper edge of chamber X as indicated at 32, see Fig. 1.

Wherever the flanges 17, 24, 1'8, 19 and 22 abut against other metal parts they are'preferably united to the contiguous parts by'welding, in a The top wall or arch sheet 25 is connected with bottom wall-16 by tubes A to permit passage of products of combustion to pass through the reduced portion R of the chamber. It will thus be seen that the chamber X consists of a bottom wall extending the full width of the fire box, a top wall consisting of the arch sheet 25, and the supporting legs L, communication between the chamber X and the water space being established at the top, the sides and the throat of the boilera In order to supplement the welded joints, the flanges l7 and 24 top and bottom walls, respectively,.of the chamber X are secured to the side walls of the inner shell 10 by means of the stay bolts 12, as shown. In a similar manner, the

lower wall 16. is secured to thearch sheet 25 by means of stay bolts 33 as shown. The flanges 19 are also secured to the crown of the outer shell 11 bymeans of the stay bolts 12, as clearly shown in the drawings, and the flanges 22 are secured to the'bottom wall lG-by the stay bolts 33. The lower portion R is also braced by the tubes A. i

In order to provide for ready access to the interior'of the boiler for inspection and cleaning,

the outer shell is provided with a plurality of openings 35, in positions registering with the legs L closed by removable plugs 36, and similar openings 35 are provided in the side walls of said outer shell in line with the ends, of chamber X, said openings also being closed by similar plugs 36. It will also be noted that the throat T is provided with similarly plug-closed openings 37, opposite to the reduced portion R.

In operation, the products of combustion from the fire box will-be driven forwardly by the draft, until they impinge against the bottom Wall 16 of the chamber X. They will then be deflected rearwardly and upwardly until they can pass over and through the fire box in contact with the upper walls 25 and side walls of the legs L. Some of the products of combustion will also pass directly through the fines A. In this'manner the chamber X serves somewhat the functions of a superheater, and the water is caused to take up a very definite' course of circulation That is to say,

the colder water enters the-chamber X from the threat :T through reduced portion R, and flows upwardly as it becomes'heated. From-the chamber-theheated water is delivered by the'le'gs L to the space W,'above the inner shell, thereby making the circulation from the throat T to the top or steam space of the boiler, and then back between the shells to the throat-again.

The advantages 'of the invention-will'be readily ,understood by those skilled in theiart to which liitl'appertains, Itvvill'be noted, for instance, that by employing the chamber X in the manner: 'described and using it as a water 'heater, so that it is normally filled. with water, thereis'noneces- 'sity for utilizing fire brick to protect it .fromthe heat.. Therefore, by means of the invention, there is a great saving in the expense'due to the elimination of the fire brick and a considerable reduction in the'cost of maintenance; A further advantage is that ,thel'c'hamber X,'1and the crown of the inner shell are so connected that said chamber tends to brace said crown,c..a ndeyet there is the required flexibility necessary for safe .operation. At the same time the safety factor is greatly increased .by improving the water cir-' ,eulation and preventing the burning out of the parts; Another important; advantage is that :there is a-substantial increase of the'water heating surface and all of the parts'are readily ac- ,tcessible for inspection and repair.

Having thus described my invention, I claim 1-- 15A boiler of the character described comprising an inner fire-box-enclosing shell, an outer shell, said shells being 'so constructed and arranged as to :provide .an intervening water space and a water throat between them, saidinner shell having relatively spaced elongated openings t'he crown portion thereof, an opening in th'e "throat and an elongated opening in each of the side Walls thereof, the last mentioned openings leading upwardly and rearwardly' from said throatan inclined shallow chamber having open :ends secured within said side openings and an :open lower side portion in communication with saidthroat opening, fire tubes insaid lower side -portion, and legs secured within the openings in' th crown of saidv inner shell and'also' secured wardly of said throat.

s e l h v i f v l a e n a 99 -mes one chamber having elongated openings in its-top ,wall, thefor-ward' ends of said ,openings terminat 7 QlngrearivardlyQOf the forward end of lsaid chamber water. legsh-aving flanges .at' theirupper ends iiorward e ds of-sa d-leg -e shell, said shellsbeing so constructed and arranged as to provide an intervening water'space I and a lower water throat between them, said innershell having relatively elongated openings in the crown portion thereof and also having'an open ends secured within said side openings and an open 'lower -side in communicatlon' wvlth said throat, fire tubes passing throughsari'dlower side, the top wall of said chamber also having elongated openings therein in register with the respective openings in the crown portion of said 1 inner'shell and extending approximately the-full width of the-chamber, andlegs having their upper portions secured within the openings of said crown portion and having their lower portions secured in the openings of said chamber for- 3. A bo'il'er'o'f the haracter described compris 7 ing an inner *fire-box enclosi-ng, s e11-, anjeuter= shel-lfsaidfshells being so'constructed and arvranged as to provide an intervening water space and a water throat between them, said inner in Jt'hecrowh portion thereof, an" opening: in he throatQand an elongated opening in. each 'of 'ithe sidejg'walls thereof, the last mentioned lopenings leading upwardly and rearwardly' ,Iro'ni said throat, a shallowicharfiber consisting jofla bottom wall and atop wall, .saidjichambe'r having open ends secured withinisaid side openings andlan open lower lsideportion Lin communication-with a fihm ts W 3? P3554 thron -h d ewe side; portion,, said top wall-having elongated said inner .jshell: and. relatively; spaced-heHQw ,ivaterlegs-having their upper, portions seeured lW P-i e, O e i s in, the i crown 0f .the :inner shell so as;:to communicate withsaidwater:space ite to :the respective openings in r and rhavingcthei'r lower":portionssecured *Within the openings of said atop wall :so as to communicate with the chamber, said legs having their forward ends disposed :rearwardly ;of :said throat;

4. A. :boiler or the character described .com- 7 prising an inner-fire-= box;enc1osing shell,an outer shell, sai'drshel'ls :being so constructed and ar-k granged'as to provide an* intervening"water space and a water throat between thfem', said :shell having relatively spaced' elon-g'ated op in the crown portion thereof, an elongated open 'ing in the throat-and an elongated opening -in each of the side walls thereof, the lastrnenticned' openings leading upwardly and rearwardly from said throat opening'andterminating 'a substantial distancefbelow said crown portion, f

'an inclined shallow chamber consisting of fla nge'd open ends 'engaging'andsecured to th .g,e'dge slof said side openings, and an open lower .sidep k,

tion provided with fiangesjengaging andflsecured tofth'e edges of'thegopening in said throat sa'id' top 'wall vopenings, and :fir-e Itubesapassing said ,chamber: petween-athe boiler throat and th 

